Nyao Koshiba

A puppy-like first-year in the middle school division. Possesses the Gunscar "Shamshir," which swaps the positions of Targets and bullets.

"The 'ko' in Koshiba is the 'ko' from 'koinu' — puppy. The 'shiba' in Koshiba is the 'shiba' from Shiba Inu!"

Hikari Koito

A super beauty. Kotoha's senior by one year. Her Gunscar is a guitar. The strongest human alive.

"This world has beautiful me in it. Argument won."

Kotoha Kotoyorozu

A boy covered in scars, exploited by the mafia for three years. Possesses the Stage 4 Apocalypse "Whisperer," which reads people's thoughts.

"Like the protagonist of a light novel. I want to have a youth."

Luna

A mechanical doll woven from metallic threads. A piercing-laden, emotionally intense, obsessively clingy stalker maid big sister.

"For now, seems like we're stuck together as partners in fate, so... let's get along?"

Mehleeza Janebekova

Kotoha's classmate. Intellectual and composed personality. Possesses the Gunscar "Sleipnir," which transforms into various forms.

"This kid's a boy, yet he's shorter than me..."